Electric Parking Brake Control Unit, Component Description - GF42.20-P-5005RR

Model 190

Shown: trunk at the rear right

Fig 1: Electric Parking Brake Control Unit Components Location - Model 190

Courtesy of MERCEDES-BENZ USA

Location

The electric parking brake control unit is located in the rear right of the trunk.

Tasks

Reading in of signals
Evaluation of input factors
Actuation of components

Reading in of signals

The input factors are read in via the following connections:

Direct line
Chassis CAN 1 (CAN E1)

Direct line

The signals from the following component are read in via direct lines:

Status of electric parking brake switch (S76/15)

Chassis CAN 1

The following information is read in over chassis CAN 1:

Status circuit 15 ON, from the electronic ignition lock control unit (N73)
Status of driver seat belt buckle restraint system switch (S68/3), from the supplemental restraint system control unit (N2/10)
Status of liftgate latch main detent switch (A85/5s1) from rear SAM control unit with fuse and relay module, over the interior CAN (CAN B) and the electronic ignition lock control unit
Currently engaged gear range from dual clutch transmission control unit (N15/13) over the drive train CAN (CAN C1) and the powertrain control unit (N127)
Drive train operational status, engine running and the accelerator pedal position from the ME-SFI [ME] control unit (N3/10) over the engine CAN (CAN C) and the powertrain control unit
Wheel speeds to determine the vehicle speed, from the electronic stability program control unit (N30/4)

Evaluation of input factors

The input factors that have been read in are evaluated by the integrated microprocessor and the relevant components are then actuated.

Actuation of components

The actuation of the components takes place via the following connections:

Direct line
Chassis CAN 1

Direct line

The electric parking brake control unit actuates the left electric parking brake actuator motor (M76/1) and the right electric parking brake actuator motor (M76/2) via a direct line.

Chassis CAN 1

The following components are actuated via chassis CAN 1:

Electronic Stability Program control unit (initiation of emergency braking)
Instrument cluster (A1) (output of messages and warnings) over the AMG gateway control unit (N93/9) and the user interface CAN (CAN HMI)

Wiring diagram for electric parking brake control unit

PE42.20-P-2101-97HBA